Swiveled attachment-plug.



F. E. SHELBY.

SWIVELED ATTACHMENT PLUG.

APPLICATION IILED JULY s, 1908 1,103,006, Patented July 7, 1914,

WITNES E5 7? 6 ATTORN EY$ UNITED STATES PATENT OFFICE.

FRANK E. SIEELEY, F BRIDGEPORT, CONNECTICUT, ASSIGNOR To THE BRYANTELECTRIC COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OFCONNECTICUT.

SWIVELED ATTACHMENT-PLUG.

Patented July *7, 1914.

Application filed July 8, 1908. Serial No. 442,504.

To all whom it may concern Be 1t known that I, FRANK E. SEELEY, a

citizen of the United States of America, re-

110 simple siding in the city of Bridgeport, in the county ofFail-field, in the State of Connectiout, have invented acertain new andImproved Swiveled Attachment-Plug,of which the following is aspecification.

The object of my invention is to provide a and efficient electricalattachment plug which shall be small and convenient. have a. swivelingaction, and be at the same time detachable. This object I attain by theconstruction which I will now describe.

In the accompanying drawings Figure 1 is a side elevation of myswiveling detachable plug in place in its socket, which is shown insection; Fig. 2 is a section of the plug on the line 22, Fig. 5; Fig. 3'is a sec-v tion of the plug on the line 3-3, Fig. 5; Fig. 4 is a sectionon the line 4-4, Fig. 2; Fig. 5 is a sectional view of the plug on theline 5-5, Fig. 2; Fig. 6 is a plan view of the socket. V

The socket part of my device will be understood upon reference to Figs.1 and 6, and comprises an Edison screw shell S having secured to itsouter margin at the open end, a collar S of insulating materialpreferably corrugated around its circumference, while the opposite endof the shell is closed by an insulating button I) carrying a centralcontact piece E. This Contact piece has a contact surface a" on its.outer face to make contact with a cooperating connection in the socketor receptacle into which the socket S is screwed, while on the innerface of the button D the cont-act piece E has a spring finger e to actupon the central contact 15 of my detachable swiveling plug F. To theperiphery of the button D are secured (clamped between the button andthe screw shell) spring fingers (Z to make contact with the shoulderedportion of a contact shell G'or. the plug F. The body not this plug isof insulating material and ma y conveniently though not necessarily beprovided with an enlarged head I) with shoulder 7) to bear on the mouthof the screw shell S, but has a cylindrical extension of reduceddiameter carlated wires and also for the reception of the metallicsegment h, Figs. 2, 3 and 4.' This segment alds 1n mechanically holdingthe contact shell G in place and in receiving the binding screw 10, forthat wire' end which makes electrical contact with the shell G, (Fig.2). Twoscrews 11, .12, threaded at diametrically opposite points intothe segment 71, Fig. 4, have heads bearing on the shell (it, holding itto the cylindrical portion of the plug. The shell G has an annularbeveled shoulder 13 to cooperate with the spring fingers or clips d tolnake electrical connection between the shell G and screw shell S and tomechanically hold the plug in place, while permitting free rotationorswiveling of the socket upon the plug. I prefer to strike up from thewall of the contact shell G a finger 14, Figs. 1 and 4, under which thewire may be passed in its way to the binding screw 10 to afford a strainrelief ends and said screw 10.

" to the connection between the ba-red wire 1 The central contact forthe plug is formed I by a central plug 77 riveted into a central hole inthe end of the cylindrical insulating body, this plug being tapped atits outer end to receive the threaded binding screw 15. The outer end ofthis plug is recessed out to form a well to receive the bared ends ofthe wire strands coiled about the screw 15, Fig. 5. The wall 16, whichforms this recess, is cut away at a JOlIlil some distance away from thehole 17, through which the wire comes out through the end of the plugbody, and consequently the carrying of the wire strands partially aroundthe projecting end of the plug 72. as shown in Fig. 5, provides a strainrelief for that wire in the same way the finger 14 provides .a strainrelief for the other wire.

I claim as my invention 1. The combination of a detachable swivclingattachment plug with an open ended receiving'socket, comprising springcont-act fingers to receive and hold the swiveling plug, a screw shell,an insulating ring secured on the outside of the open end of the .shelland an insulating button closing the opposite end, said button carryinga central contact with inner and outer contact faces.

2. The combination of a swiveling attachment plug having a centralcontact and a receiving socket comprising a screw shell, an insulatingring secured on the outside of the,

rying spring fingers and also a central contact with inner and outercontact faces.

3. An attachment plug, comprising a hollow insulating body with ametallic segment.

therein, an outer contact shell, securing means for the latter enteringthe segment, and a binding screw also threaded into the segment, andcentral contact on the plug.

4. An attachment plug comprising a hollow insulating body with alongitudinal opening for a wire and having a side contact with bindnigscrew and a central end contact in the form of a binding screw for thewire 15 through the longitudinal opening in the body. 1 I

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses.

F. E. SEELEY. Witnesses:

A. J. WATERHOUSE, H. W. GOLDSBOROUGH.

